Sighting device for ordnance



M. BARTHOLDY.

SIGHTING DEVICE FOR ORDNANCE.

APPLICATION FILED SEPT.3, 1920.

1,384,007. Patented July 5, 1921.

tnuznfo Max MAX BAR'I'HOLDY, OF ESSEN, GERMANY ASSIGNOR TO FRIED. KRUIPP AKTIEN- GESELLSCEAFT, OE ESSEN-ON-THE-EUHR, GERMANY.

SIGHTING- DEVICE FOR ORIDNANCE.

Specification of Letters P en Patented July 5, 1921.

Application filed September 3, 1920. Serial No. 408,099.

To all whom it may concern:

Be it known that I, MAX BARTHOLDY, residing at Essen, Germany, a citizenof the German Republic, have invented a certain. new and usefulImprovement in Sighting Devices for Ordnance, of which the followin is aspecification, for which I have filed an application in Germany Jan. 23,1919.

This invention relates to sighting devices for ordnance with a numberedgraduation corresponding to the range of the target and is characterizedby the fact that of the two members which carry the graduation and thereading ofi' mark belonging thereto the reading oif member, which isadjustable for range, is positively connected to the carrier for themeans of sighting by a kinematic quadrilateral system the dimensions ofwhich are so chosen that the. changes in the position of the reading 05membervwhich corresponds to the unequal changes in the angular positionof the sighting means carrier corresponding to equal changes of rangeare sufficiently equalized. Sighting devices of this kind possess theadvantage that the pivoted quadrilateral, which permits of thearrangement of the carrier of the means of sighting in any desiredposition in the well known way, is simultaneouslyutilized to receive arange graduation with suiiiciently uniform distances between thedivision marks.

The invention will be further described with reference to theaccompanying drawings, which show a construction of the invention and inwhich Figure 1 is a side elevation of the sighting device and of theadjacent parts of the gun and Fig. 2 is a portion of a section on theline 24 of Fig. 1.

A denotes the gun barrel, which, when the gun is fired recoils in acradle B. This latter is mounted by means of the two trunnions b in thegun carriage C. The sighting device of the gun is mounted on the cradle,and has a sighting telescope D, which is mounted on a bar-shaped carrierD for the sighting means. The carrier D is pivotally mounted by means ofa pin 6 parallel with the axis 6 of the trunnions on a bracket arm 6fixed to the cradle and terminates at its rear end in a sector-shapedguide (Z arranged coaxially with the pin Z2 In this sector-shaped guide72 is mounted a correspondingly shaped sliding relat vely to which thecarrier D for the sighting means can be adjusted by means of a spiralpinion F mounted on, the guide d and engaging in a series of teeth 6 onthe sliding niece 'for the purpose correcting its angular position. Bythis adjustment correction may be made to accommodate such conditions asdensity of the atmosphere, elevatlon of the position of the gun withrespect to the target, etc.

The extent of this correction can be read oil by means of a mark (Z onthe guide d relatively to a graduation arrangedonthe sliding piece E andhavin its zeromark in the middle. To the sliding piece E is attached oneend of a connecting rod G, which at its other end is connected to acrank arm This latter is rigidly connected'to a worm wheel H ,which isrotatably mounted in a casing b fixed on the rear end of the is moutnedav cradle B. In the casing Z2 worm J rigidly connected to vided with amilled head 2' the worm wheel H The worm gear J H serves to impart tothe carrier D for the sighting means the angular position relatively tothe gun barrel, which corresponds to the range of the target. The rangeof the target is read off on a range graduation M, which is arranged onan annular sectorshaped rib 7&2

reading oti mark 6 edge of an aperture graduation 7f is visible.rilateral system, which is cradle B, the crank arm H wheel H theconnecting rod G-and the sliding piece E with the carrier D for thesighting means adjusted ot the zero point of a shaft prowhich is placedon the When the quadformed by the piece E,

and, gearing with Z2 through which the a with the worm on the worm wheelH and a the graduation 8 is so adjusted by the worm gear H J that theslghting line of the telescope D is parallel with the longitudinal axisof the gun barrel, and the mark Z2 consequently points to the Zero pointof the graduation b the crank arm H of the quadrilateral system situatednext to the By -suitably "selecting the dimensions of these parts it iseasy to insure that the un-f equal changes in the angular position i ofthe carrier D 7 for the sighting means (corresponding to equal changesin the range of the target) correspond to sufiiciently equal changes inthe angle of rotation of the crank arm H and .of theworm wheel 11 thatis .to

- say,'to sufliciently'equal changes in the relative positions of thetwo members (H 71, and b 6 which carry the rangegraduationand'the"corresponding" reading off mark (bi), 8S0 that the distancebetween the di- Vision :Inarks of 'the range' graduation h is V Theakinematic quadrilateral system, which allows {of *the'arrangement ofthesighting telescope inany desired point such for example in' the vicinityof the lookout slit 1n an armored shield (not shown) mounted I ontheflgun carriage, is also used at the same time towobtain airangegraduation with a sufliciently-unifoIm distance between the divisionmarks. V

sGlaims '11. device of ran .e,*- which embodies acasing and a rotata le'member, with means for rotating saidimem'ber, one end of the sightingmeans 'connectingfisaidslidable member-and rotacanrier'terminatin'g in asector-shaped'.;guide, a. islidablefmember 'mountedin said guide, meansfor'azarying the position 01% the slidable? member in-said guide,' arrnsop'eratiyely table member,2said parts being arranged to form kinematicquadrilateral system, 'sub- 1 stanti'a'ly wa d rer the purpose-setforth.

2. Assi ghting device of the class jdes'cribed comprisin ia sightingtelescope, a sighting means carr er, at sector-shaped guide formed atone end of said carrier, a slidingimember v mounted in'said guide, fmeansfor adjusting the position o f said sliding piece with 're-V spect tosaid-guida a, irange.'-inclicating device'aembodying'a casing, aworm-wheel and means "for rotating said wheel, an arm rig-i idlyconnected to said worm-wheel, a second armioperativelyconnecting theslidin member" to the-fir'st-mentioned arm, said parts forming akinematic quadrilateral sys em,

' saidsecond arm formingwith said first arin carrier an'obtu'se angle,substantially 'as' described.

an acute-angle and with"the sighting means;-

3. A sighting device for ordnance comprising-a gunP'barrel' andsupporting parts,

a sighting means carrier rotatable relatively to a g-u n par-t adaptedtot'urn inunison' with pivotallyconirecting said adjustable mem 7 herand saidsighting means carrier, said r adjustable member, thesightinggmeans .car-' the 7 class described vcom- 1: pr s ng a sghtingmeansya carrier for said sighting means, device for indicatlng the7 necting' 'said j the gunibarrel', an adjustable 'member rotatablymounted on said gun part, means 'for adjusting said nmember for vrange,a

.range lndlcatlng devlceihavlng area/cling 5. c

ofi member carrying a range scale, and a rod rier and the connecting rodforming a kinematic' systelnof "an automatically variable ratio oftransmission for equalizing-the dis tance between the-divisionmarks'ofsaid rangevscale.

ft. 11%: sighting; device'ior ordnance com-f a prising a gun barrel andsupporting parts, a 'slghtlng ,mea'ns carrier" rotatable relativelyto'a' .gun gart adapted to turn in unison with 7 V a arrel, anadjustable member ro-f j:

tatably mounted on sa d gun part, meansf g o thejgun for adjusting said--memb e rj for] vrange, jai range indicating ClGVlCG having ,a freadlng01f. member carrying arange scale, andi'a rod spiv'ota'lly connectingsaid ladjustable member-and said sightingmeans carriegf sa d ad ustablememb r and r the slght -ng 3 a means carrier 'formlng'the crank armsio-fja 3; I

kinematic quadrilateral system in which when said '7 adjustable memberis adjusted 1 for the range of zero one crank armiis alr- 'Y and theother crank arinfis arranged]- 1"- at an obtuse angle with'said rod. jsighting .dev'icerfor ordnance comf, c

p g g bar an "sHnWrtiI a-r r s' v. .a sighting means carrier rotatablerelatiyely toa gun partadapted to'turnin-unisonwith I 'f ranged at anacuteanglewith:said connect ing rod h l er W t-u ab e member tatably: mont dn aria-gun part, mea s" for adjustingsaidf'niemloer for range, "ja

range indicating/device" having a'i re'ading ogi y off member carryinga'range'scale,arslidin 1 piece anounted on said sighting ineans' car-1'l rier, means forladju ti id sliding; piece relativelytosa'idsighting,meanscarrierffor' 7 range icorrectioniaarid a rod plyotally con} 11 055.; ediustable memb r and said ing Pie The foregoingspecific sen, Ge

said adjustable member, the s

